Photographic-printing apparatus



Y G. E. TORNSO.

PHOTOG'RAPHIC PRINTING APPARATUS.` APPLICATION FILED Au ;.I9. IsIa.

Patented May l13, 1919.

GUSTAF E. TOBNSJO, F ST. PAUL, MINNESOTA.

PHOTOGRAPHIC-PRINTING APPARATUS.

Specification of Letters Patent.

Patented May 13, 1919.

Application led August 19, 1918. Serial No. 250,417.

To all whom z't may concern:

` lBe it known that I, GUsTAF E. ToRNsJo, a

citizen of the United States, residing at St. Paul, in the county ofRamsey and State of Minnesota, have invented certain new and usefulImprovements in Photographic- Printing Apparatus, of whichthe followingis a specification.

My invention relates to photographic printing apparatus. Heretofore, ithas been largely the custom with establishments or persons engaged inmaking photographic prints for amateurs, and other persons as well, tomark each print or to place an identicaftion number on the back thereofwhere it remains after the prints have been finished. The differentorders for prints that come in are usually designated by successivenumbers and the number assigned to any particular order is placed on theback of all of the prints belonging to that order. If the numbers areput on in pencil, some additional time is required even when this isdone hurriedly and there is always a possibility of error due to placingthe wrong number on the print and also on account of numbers being moreor less illegible. Furthermore, many persons dislike having' marks ornumbers on the backs of their prints, especially when these prints areleft unmounted. The object of my invention, therefore, is to avoid theabove disadvantages by providing an attachment for photographic printingapparatus by means of which one or more edges of the printing paper maybe printed with identication characters at the time when the prints aremade from the negatives, these characters bein produced on the edge ofthe paper whic 1s trimmed oi after the prints have been developed anddried. In carrying out the process the waste ed es are trimmed off atthe time when the prints are sorted into vtheir proper groups and hencean identification mark on each print is no longer necessary.

The full objects and advantages of my invent-ion will appear inconnection with the detailed description thereof and are particularlypointed out in the claims.

Referring to the drawings which illustrate the application of myinvention in one orm,-

Figure 1 is a view in perspective of aconventional form of photographicprinting apparatus in connection with which my inven- .tion isemployed.' Fig. 2 is an enlarged top plan'view of my attachment. Fig. 3is a view in section on the line 3-3 of Fig. 2. Fig. 4 is a sectionalplan view of the letter disk. Fig. 5 .is a section on the line 5-5 ofFig. 4.

In the drawings,12 designates the table of a printing apparatussupported on a stand 14 and having a pivoted pad member 1G adapted to beoperated in customary manner to hold the negative 18 (either a plate ora film) and the printing paper 20 in close contact upon a transparentplate 22 set into the table and underneath which are lamps 23 adapted tobe switched on and oi in the customary manner. These parts are embodiedin apparatus of well known construction and need not be describedfurther. Adjacent to adjoining edges of the transparent plate are stops24 and 26 secured to the table by screws 28. A guide rod 30 is securedto the table adjacent and beyond the stop 24 by attaching members 32 and34 while a guide rod 36 is secured to the table by an attaching member38 and the attaching member 34. The guide rod 36 is on the opposite sideof the table from the stop 26. The rod 30 serves to guide a slidablecylindrical member 40 having a lug 42 thereon for operating it andhaving a lug 44 to which is secured a thin masking strip 46 of durablematerial. This strip is provided with a hole 48 adjacent which are tworotatable disks 50 and 52 secured to the strip by rivets'passing throughtheir centers and through the strip. Both disks are provided aroundtheir peripheries with the ten numerals from 0 to 9 cut through thematerial of the disks. These disks are so located relatively to the hole48 that any number from 1 to 99 may be o vious that by` a suitablearrangement of disks, larger numbers may be indicated ifv desired. Y Therod 86 previously referred to serves to guide a slidable cylindricalmember 54 having a lug 56 thereon for operating it and a lug 58 to whichis attached a thin masln'ng strip 60 of durable material. This strip isprovided with a hole 62 adjacent which is a rotatable disk 64 secured tothe strip by arivet 66 passing through the cen- 'any desired number ofthe letters of the alphabet, and these letters are cut through thematerial of the disk, the latter being so located relatively to thehole-that any one of the letters may be made .to register therewith. Byreferring to Fig. 2, it will be seen that the distance of the holes 48and 62 from the inner edges ofthe strips in which they are Vcut is thesame as the distance of the stops from the adjacent edges of the glass22. This insures the characters being printed upon the waste edge of theprinting paper when-the strips are properly positioned. The letters areintended to indicate which particular machine has been used in makingthe prints while the numbers indicate the particular order or batch thatis being printed.

The operation and advantages of my invention will be apparent from theforegoing description. In the use of the apparatus, the negative isplaced upon the plate 22 with `two of its edges in contact with thestops24 and 26. rPhe masking strips 46 and 60 preferably lie directly upontheplate 22 so as to be underneath the negatives and they are moved along.the guide rods so as to be in proper position relatively to the edges ofthe negative according to the size -of the latter. The disk 64 of coursehas to-be set Aonly, once to designate the particular machine. Thedisks'O and 52, however, are set to correspond with the number assignedtov a particular order orbatch each time that the printing ofa'different order or batch is to The number does not have to be changedluntil another order or batch is to be printed. The printing paper`20 ofthe proper size is placed with its sensitized surface in contact withthe 4negative and with tw'o of its edges against the stops 24 and 26 andwith the other two edgesextending over the holes 48 and 62 as designatedby thedot and dash lines 68in Fig. 2. The pad member 16 is then broughtdown upon the top of the printing paper and the print is made intheusual manner by means of the lamps 23. The particular letter and numberwhich have been set to register with the holes in the masking stripswill be printed photographically upon the Waste edge of the picture.After the prints have been developed and dried, the waste edges thereofare trimmed oli', tion marks.

I claim:

1. A photographic printing apparatus comprising a support for thenegative and the printing paper, a stop adjacent an edge of saidsupport, sald stop being adapted for engagement by an edge of saidpaper, an adjustable masking strip adapted to be posi'tioned underneaththe edge of said paper opposite the aforementioned edge thereof, andmeans carried by said strip for printing indentiication characters uponthe waste edge of said paper.

2. A photographic printing apparatus comp-rising a support for thenegative and printing paper, a pair of stops adjacent two adjoiningedges of said support respectively, said stops being adapted forengagement by adjoining edges of said paper, a pair of adjustablemasking strips adapted to be pos'itioned underneath the edges of saidpaper respectively opposite the aforementioned edges thereof, and meanscarried by each of said strips for printing identification c'harone ofsaid' characters may be brought into register with said hole.

4. fA photographic printing apparatus comprising a support for thenegative and the printing paper, a stop adjacent an edge of saidsupport, said stop being adapted for engagement by an edge of saidpaper, an adjustable masking strip adapted to be positioned underneaththe edge of said paper opp'osite the aforementioned edge thereof, saidstrip being provided with a hole and a rotatable disk having a pluralityof characters cut therethrough and extending around the peripherythereof, said disk being adapted for rotation whereby anyone of saidcharacters may be brought into register with said hole. I

5., A photographic printing apparatus comprising a support for thenegative and the printing paper, a pair of stops adjacent two adjoininged es of said support respectively, said stops ein adapted forengagement by adjoining edges of said paper, a pair of guide rodsadjacent two adjoining thus removing the identiicaedges of said supportrespectively, an adcarried by each of said strips for printing justablemasking strip slidabl mounted on identification characters upon thewaste each of said guflde rods, sai strips being ediles of said paper.

adapted .to be positioned underneath the testimony whereof I hereuntoaix my 10 5 edges of said pa er respectively o posite signature.

the aforementioned) edges thereof, undp means GUSTALF E. TORNSJO.

